| Theme | The front line of magnifying endoscopy and pit pattern diagnosis -- Now and future | |
|---|---|---|
| Title | Magnifying chromoendoscopy and optical / digital chromoendoscopy using NBI system | |
| Publish Date | 2005/03 | |
| Author | Hirohisa Machida | Department of Gastroenterology, Graduate School of Medicine, Osaka City University |
| Author | Yasushi Sano | Division of Gastrointestinal Oncology and Endoscopy, National Cancer Center Hospital East |
| Author | Fu Kuang-I | Division of Gastrointestinal Oncology and Endoscopy, National Cancer Center Hospital East |
| Author | Shigeaki Yoshida | Division of Gastrointestinal Oncology and Endoscopy, National Cancer Center Hospital East |
| [ Summary ] | Aim : Differential diagnosis between non-neoplastic and neoplastic lesions is very important during colonoscopy. We estimated the reliability of indigo carmine dye spraying, with and without magnification, compared to the conventional methods for differential diagnosis. A new diagnostic method, the NBI system, was also reviewed in terms of differential diagnosis of colorectal lesions. Method : 206 lesions in 122 patients were diagnosed with conventional endoscopy, chromoendoscopy and chromoscopy with magnification. The diagnoses at each step were categorized as neoplastic or non-neoplastic according to pit pattern. The accuracy rate for each type of endoscopic diagnosis was evaluated compared with histological diagnoses. Results : The overall diagnostic accuracies with conventional endoscopy, chromoscopy, chromoscopy with magnification were 84.0 %, 89.3 % and 95.6 %, respectively. Conclusion : Chromoscopy with magnification is the most reliable method for determining whether a colorectal lesion is non-neoplastic or neoplastic. The accuracy rate in differentiating neoplastic from non-neoplastic lesions was similar with chromoscopy or NBI systems. To establish a new diagnostic algorism, a randomized controlled study should be conducted to estimate the efficacy of NBI colonoscopy systems. |
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